Sure enough, the internet was fantastic with this new modem. Fast, no problems, etc. Now, however, after a couple of weeks, the same problem has crept up. Surfing the internet has become an excruciating process. I check the task manager, but it does not appear that any processes are running behind the scenes (although thats what it seems like is happening). I disabled all anti-virus. I again checked for spyware and adware and came up clean.
I sort of have the same problem. I bought a new modem and it worked for a while, now it does in and out. When I called the cable company they said it was fine on their end. What there telling me now is they may need to come install a brand new line coming into the house. A few factors led them to this, I don't know if they apply to you (oh and i've had cable internet for a year or two with no problems before this). They said it could be because the cable line coming into my house has been here for ages. And I think it might be because I have it spliced so much it isn't even funny.
Do you have your cable spliced anywhere? (like also have cable tv) If so, try going to the spliter and switching the cable that goes to your TV with the one that goes to your modem (ie if it's a two way spliter and you have the one on the left going to the TV and the one on the right going to the modem, switch them so the one on the left goes to the modem and the other the TV) or just plan out replace the splitter, yeah sounds stupid but this is what they told me to do, and it did work for a couple weeks with no problem (I just replace the who splitter, it was a two-way so it cost like 5 bucks). Also, note I am talking about the regular cables only not the ethernet cables. After you do that you need to unplug your modem, and unscrew the cable form it for about one minute (dont know if the unscrewing is a must but it cant hurt) after reconnect it all and plug it in and let it connect see if that helps (also this is the point to restart your router if applicable). If in about 5 minutes still slow or no connection then your going to need to try the cable company again
ALSO please make sure you write down what you do, if they do come out, you don't want them to try and say its something you did...because they will wether or not it was if they can find a reason to, so re-hook it up the way they had it (including their old parts).
I'm only asking you to switch the wires at the spliter should only been a one minute process unscrew one..screw it into the one next to it, dont complete rewire anything lol, unless you want to put in all new cables or something :-|